The NSN 4730-00-150-6118 refers to a specific type of tension hose clamp, often identified by part number 11663000. Unlike a standard worm-gear clamp that you tighten with a screwdriver, this is a constant-tension spring clamp designed to be compressed with pliers for installation and removal.
 
Technical Details
Common Part Number: 11663000 (U.S. Army Tank Automotive Command).
Material: Steel, often with a cadmium or zinc protective coating.
Application: Primarily used for fuel or low-pressure fluid lines in military vehicles like the M113 armored carrier or M-series trucks.